Antimicrobial treatment of porous materials

• US 20020168473A1
• Filed: 05/03/2002
• Published: 11/14/2002
• Est. Priority Date: 05/08/2001
• Status: Abandoned Application

• Current Assignee: Creavis Gesellschaft Fuer Technologie Und Innovation Mbh
• Original Assignee: Degussa AG (Rag-Stiftung)
• Inventors: Schmidt, Friedrich Georg, Heidlas, Juergen, Ottersbach, Peter, Sosna, Friedrich
• Application Number:
  US10/137,446
• Publication Number:
  US 20020168473A1
• Time in Patent Office: Days
• US Class Current: 427/337
• CPC Class Codes: B05D 1/025 using gas close to its critical state
• CPC Class Codes: B05D 1/18 performed by dipping
• CPC Class Codes: B05D 2401/90 at least one component of the composition being in supercritical state or close to supercritical state
• CPC Class Codes: B27K 3/08 Impregnating by pressure , e.g. vacuum impregnation
• CPC Class Codes: B27K 3/15 Impregnating involving polymerisation including use of polymer-containing impregnating agents macromolecular compounds derived from lignocellulosic materials C08H; compositions of lignin-containing materials C08L97/02
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 2103/007 Supercritical fluids
• CPC Class Codes: C04B 2111/2092 Resistance against biological degradation
• CPC Class Codes: C04B 41/009 characterised by the material treated
• CPC Class Codes: C04B 41/483 Polyacrylates
• CPC Class Codes: C08L 33/06 of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
• CPC Class Codes: C08L 33/26 Homopolymers or copolymers of acrylamide or methacrylamide
• CPC Class Codes: C08L 97/02 Lignocellulosic material, e.g. wood, straw or bagasse manufacture of articles made from lignocellulosic material by dry processes B27N
• CPC Class Codes: Y02P 20/54 using solvents, e.g. supercritical solvents or ionic liquids

Abstract

The present invention relates to a antimicrobially-treated porous materials and a process for impregnating porous materials with antimicrobial polymers using supercritical media.

Claims

1. A process for impregnating a porous material with an antimicrobial polymer, comprising:

applying a solution or a dispersion media comprising an antimicrobial polymer to a porous material; and

then

contacting the porous material with a supercritical medium.

2. The process according to claim 1, wherein the solution or dispersion media comprising the antimicrobial polymer is dried on the porous material before contacting the porous material with a supercritical medium.

3. The process according to claim 1, wherein the solution or dispersion media is removed from the porous material, leaving the antimicrobial polymer in contact with the porous material, before the porous material is contacted with a supercritical medium.

4. The process according to claim 1, wherein the porous material comprises at least one member selected from the group consisting of natural stone, artificial stone, mineral, concrete, wood, plaster, glass, clay, cement, mortar, and ceramic.

5. The process according to claim 1, wherein the antimicrobial polymers are prepared from at least one member selected from the group consisting of a nitrogen-functionalized monomer and a phosphorus-functionalized monomer.

6. The process according to claim 1, wherein the supercritical medium comprises carbon dioxide.

7. The process according to claim 1, wherein the antimicrobial polymer is prepared from at least one monomer selected from the group consisting of 2-tert-butylaminoethyl methacrylate, 2-diethylaminoethyl methacrylate, 2-diethylaminomethyl methacrylate, 2-tert-butylaminoethyl acrylate, 3-dimethylaminpropyl acrylate, 2-diethylaminoethyl acrylate, , 2-dimethylaminoethyl acrylate, dimethylaminopropylmethacrylamide, diethylaminopropylmethacrylamide, N-(3-dimethylaminopropyl) acrylamide, 2-methacryloyloxyethyltrimethylammonium methosulfate, 2-diethylaminoethyl methacrylate, 2-methacryloyloxyethyltrimethylammonium chloride, 3-methacryloylaminopropyltrimethylammonium chloride, 2-methacryloyloxyethyltrimethylammonium chloride, 2-acryloyloxyethyl-4-benzoyldimethylammonium bromide, allyltriphenylphosphonium bromide, allyltriphynylphosphonium chloride, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-diethylaminothyl vinyl ether, and 3-aminopropyl vinyl ether.

8. The process according to claim 1, wherein the porous material contacts the supercritical medium at a pressure from 50 to 500 bar.

9. The process according to claim 1, wherein the porous material contacts the supercritical medium at a temperature from 10°

C. to 150°

C.

10. The process according to claim 1, wherein the solution comprising the antimicrobial polymer further comprises at least one member selected from the group consisting of ethanol, methanol, propanol, isopropanol, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, toluene, and xylene.

11. The process according to claim 1, wherein the dispersion media comprising the antimicrobial polymer further comprises a polyethylene glycol derivative.

12. The process according to claim 1, wherein the solution or the dispersion media comprising the antimicrobial polymer is applied to the porous material by brush, spray, or immersion.

13. The process according to claim 1, wherein the porous material is contacted with the supercritical medium in the presence of a solvent comprising at least one member selected from the group consisting of ethanol, methanol, propanol, isopropanol, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, toluene, and xylene.

14. The process according to claim 13 wherein the antimicrobial polymer comprises a weight-average molecular weight of from 10,000 to 7,000,000.

15. The process according to claim 1, wherein the antimicrobial polymer comprises a weight-average molecular weight of from 20,000 to 5,000,000.

16. A porous material made by the process according to claim 1.

17. A building, comprising the porous material according to claim 16.

18. A monument, comprising the porous material according to claim 16.

19. A construction, comprising the porous material according to claim 16.

20. A process for preparing a construction, building, or monument, comprising

applying a solution or dispersion comprising an antimicrobial polymer to a porous material;

and then

contacting the porous material with a supercritical medium; and

then

using the porous material as a building material of a construction, building, or monument.

21. A process of impregnating porous materials with an antimicrobial polymer, comprising contacting a porous material to which an antimicrobial polymer has been applied with a supercritical medium.

22. The process according to claim 21, wherein the porous material comprises at least one member selected from the group consisting of natural stone, artificial stone, mineral, concrete, wood, plaster, glass, clay, cement, mortar, and ceramic.

23. The process according to claim 21, wherein the antimicrobial polymers are prepared from at least one member selected from the group consisting of a nitrogen-functionalized monomer and a phosphorus-functionalized monomer.

24. The process according to claim 21, wherein the supercritical medium comprises carbon dioxide.

25. The process according to claim 21, wherein the antimicrobial polymer is prepared from at least one monomer selected from the group consisting of 2-tert-butylaminoethyl methacrylate, 2-diethylaminoethyl methacrylate, 2-diethylaminomethyl methacrylate, 2-tert-butylaminoethyl acrylate, 3-dimethylaminpropyl acrylate, 2-diethylaminoethyl acrylate, , 2-dimethylaminoethyl acrylate, dimethylaminopropylmethacrylamide, diethylaminopropylmethacrylamide, N-(3-dimethylaminopropyl) acrylamide, 2-methacryloyloxyethyltrimethylammonium methosulfate, 2-diethylaminoethyl methacrylate, 2-methacryloyloxyethyltrimethylammonium chloride, 3-methacryloylaminopropyltrimethylammonium chloride, 2-methacryloyloxyethyltrimethylammonium chloride, 2-acryloyloxyethyl-4-benzoyldimethylammonium bromide, allyltriphenylphosphonium bromide, allyltriphynylphosphonium chloride, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-diethylaminothyl vinyl ether, and 3-aminopropyl vinyl ether.

26. The process according to claim 21, wherein the porous material to which an antimicrobial polymer has been applied contacts the supercritical medium at a pressure from 50 to 500 bar.

27. The process according to claim 21, wherein the porous material to which an antimicrobial polymer has been applied contacts the supercritical medium at a temperature from 10°

C. to 150°

C.

28. The process according to claim 21, wherein the porous material to which an antimicrobial polymer has been applied is contacted with the supercritical medium in the presence of a solvent comprising at least one member selected from the group consisting of ethanol, methanol, propanol, isopropanol, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, toluene, and xylene.

29. The process according to claim 21, wherein the antimicrobial polymer comprises a weight-average molecular weight of from 10,000 to 7,000,000.

30. The process according to claim 21, wherein the antimicrobial polymer comprises a weight-average molecular weight of from 20,000 to 5,000,000.

31. A porous material made by the process according to claim 21.

32. A building, comprising the porous material according to claim 31.

33. A monument, comprising the porous material according to claim 31.

34. A construction, comprising the porous material according to claim 31.

35. A process for preparing a construction, building, or monument, comprising

applying a solution or dispersion comprising an antimicrobial polymer to a porous material;

and then

contacting the porous material with a supercritical medium; and

then

using the porous material as a building material of a construction, building, or monument.